BMW 3-Series gets cleaner engines 23 March 2010 by Parkers Cleaner diesel engines across the range Facelift and more kit for Coupe and Convertible Sub-110g/km 320 diesel means lowest BIK tax band An improved range of BMW 3-Series models have gone on sale this week, including the lowest emissions version ever produced. The Coupe and Convertible models receive a mild facelift, extra equipment (leather is now standard) and also gain engines that are more powerful yet have lower emissions. The revised 318d saloon and Touring variants now fall into the lowest 13% diesel benefit-in-kind tax band thanks to CO2 emissions of 119g/km.For drivers looking for an ultra-low emission car, the 320d EfficientDynamics Saloon offers CO2 emissions of 109g/km (13% BIK band) and fuel economy of almost 69mpg. With a P11D price of £26,480, this model will cost a 40% taxpayer £114 a month in company car tax. Elsewhere, the 2.0-litre diesel in the 320d versions now has 184bhp (up 7bhp), emits 125g/km (down 3g/km) and returns economy of 60mpg (up 1.2mpg). The six-cylinder diesel 325d models now have 204bhp (up 7bhp), return 49mpg and emit 151g/km (down 2g/km).